Brazing best practices, nitrogen purge brazing, and air fuel vs oxy fuel system decisions all reveal the same principle: the best tradesmen never cut corners.

Host Andrew Brown sits down with John Henderson, Sales Director of Gas Equipment at ESAB, live from AHR Expo to examine why disciplined fundamentals—not speed—separate respected contractors from those constantly fixing preventable mistakes.

John explains why nitrogen purge brazing is often skipped on job sites and why experienced tradesmen refuse to treat it as optional. What may look like a small time-saver can introduce internal oxidation, long-term system damage, and costly callbacks. The conversation also explores how choosing between an air fuel vs oxy fuel system requires understanding heat demands, portability, and application—not default habits.

Beyond equipment and technique, Andrew and John discuss how skilled trades training and mentorship instill the discipline that defines craftsmanship. From HVAC technicians to plumbers, electricians, and construction professionals, this episode reinforces a simple truth: reputation is built on standards upheld when no one is watching.

IN THIS EPISODE

(00:00) – Why the Best Tradesmen Refuse to Cut Corners

(02:18) – Job Site Shortcuts: Where Contractors Sacrifice Time or Standards

(07:47) – Air Fuel vs Oxy Fuel System: Choosing Tools That Match the Work

(09:05) – Nitrogen Purge Brazing: Why Fundamentals Protect System Integrity

(11:08) – Skilled Trades Training and Mentorship: How Standards Are Passed Down

(15:13) – Tool Durability and Maintenance: Real-World Demands vs Demo Conditions

Key Takeaways

The best tradesmen protect their reputation by upholding fundamentals, even when shortcuts seem faster.

Nitrogen purge brazing prevents internal oxidation and protects long-term system performance.

Tool selection—including air fuel vs oxy fuel systems—should be based on job requirements, not convenience.

Short-term speed often creates long-term rework, callbacks, and lost trust.

Skilled trades training and mentorship reinforce the standards that define true craftsmanship.

About the Guest

John Henderson is Sales Director of Gas Equipment at ESAB and a 40-year veteran of the Trades Industry. He works closely with contractors across HVAC, plumbing, and construction sectors, focusing on safety, performance, and tool durability under real-world job site conditions.

John is committed to strengthening skilled trades training and mentorship rooted in fundamentals. His work centers on helping contractors build durable reputations through disciplined technique and sound equipment decisions.

Keywords

Brazing Best Practices, Nitrogen Purge Brazing, Air Fuel vs Oxy Fuel System, Skilled Trades Training and Mentorship, Contractor Tool Durability and Maintenance, Skilled Trades, Trades Industry, Construction, HVAC, Electricians, Plumbers, Millwrights, Carpentry, Tradespeople, Trades Careers, Andrew Brown, John Henderson, ESAB, Skilled Trades Advisory Council, Craftsmanship, Contractor Efficiency, Standards, Mentorship, Problem-Solving, Industry Experts

RESOURCE LINKS

LinkedIn Profile: https://www.linkedin.com/in/john-henderson-12943611/

ESAB Website: https://esab.com/us/nam_en/

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(Transcribed by TurboScribe.ai. Go Unlimited to remove this message.) You do it the exact same way, the exact same time, every single time, and you only do it once. Do it

once, do it right, and you're done. Talk to any contractor. Time is money. I need to be able to

get in, get my job done, get it done correctly, and then make sure that I don't have to come back.

John Henderson, Sales Director, Gas Equipment for ESAB Welding and Cutting.

I want to talk about where contractors lose time or maybe cut corners or what actually holds them

on the job site and not what looks good in a demo.

They will be asking us about competitive equipment. Well, what's good, what's bad,

and that's the thing that we do tell them. Yes, there are differences in the market. People will

skip using nitrogen as a purge. Those true craftsmen, they never forget the basics. You

can watch it day in and day out, but when you see people that do, they take those steps away.

If someone here at AHR changed one habit tomorrow to save time and avoid callbacks,

what should it be? It's interesting when...

Hi, I'm Andrew Brown. You're listening to the Lost Star of the Skilled Trades podcast,

a show that shines the spotlight on careers in the skilled trades that are high-paying,

honorable, rewarding, and fulfilling. The trades are the backbone of the economy that keep us

running, and without them, our world would cease to exist.

Welcome back to the Lost Star of the Skilled Trades podcast. I'm your host, Andrew Brown.

Super excited to be here live at the AHR Expo here in Las Vegas. And today, I have John Henderson,

sales director for gas equipment for ESAB. Welcome, John, to the show.

Hey, Andrew. Glad to be here. Thanks for being here with us.

Yeah, and I'm super excited. The energy here is just full of just... It's just amazing.

This is a great show. And let's face it, the weather's perfect. If you look at the foot

traffic, this is good. It's going to be a great first day. This is great.

Great. And it's a great start to kick it off.

I agree.

John, you've seen sort of brazing done in the real world. And we talked about that every day,

maybe, that you've seen it. And I want to talk about where contractors lose time,

or maybe cut corners, or what actually holds them up on the job site, and not what looks

good in a demo. So I wanted to go here. Where do you see contractors losing the most time brazing,

even when they think they're doing everything right?

I like what you said. You said, where do contractors lose time?

And then you said, where do they cut corners? What's interesting is what we find more often

than not, the reason that they lose time is they did cut a corner. Cutting corners is not going to

work. You're either going to do the job right the first time, or you're going to fix it the second

time. So cutting those corners, all it does is it sets themselves up for doing a second operation.

So little things, simple. These are the things that they learn. It's what I would say, brazing

101. You always clean your material. You always work with good material. You always do the basics

every single time. Because invariably, the time that you don't, the time that I don't sand my

material down, I don't brush it, I don't do all those little things that I should do every single

time. I go ahead, I'm in a hurry, I do the operation, I test it, and guess what? It leaks.

And they will even in their mind say, you know what? I forgot. I didn't brush it off before I

started. So what we find is that when you do things efficiently, time and time, and repetitively,

that's one when we're teaching people, and every trade school will do this. You do it the exact

same way, the exact same time, every single time. And you only do it once. Do it once, do it right,

and you're done. You go on about your job. Yeah. And you talked about obviously rushing

through things, right? Not taking all the steps. And maybe someone gets pressured to do a job

done. You've probably seen that before, but making sure that you follow all those steps

when it comes to that. And you talked about the trade school side of that, you know, learning that,

you know, is that a skill that's kind of learned over time? Is that taught,

you know, by a mentor of some sort on site or how that? It depends on their journey. If you think

about, you know, traditionally you do have, you know, we have trade schools. So the trade schools

are going to be taught from the ground up. But then you do have some that they'll get into the

industry and they don't have the skills to do this. Now they are going to learn from someone,

and it usually is a mentorship. They're working with the guy that's been doing this for 30 years

or 40 years, what we call a journeyman tradesman. They know all the secrets to do the job right.

And every single one of them will tell you, do it the same way every time. Don't cut corners.

Yes. Do it very efficiently. Because what they will find is that when you're learning,

it's going to take you a while, but once you get, once you get to the point where you're proficient,

it happens. It's like magic. I always say it's, it is truly an art form. When you're watching

somebody brazing, I just, I love somebody that's really good because it is an art watching them

quickly, easily do a braze and then they're off, they're done. And because they're so quick at it,

they know exactly just from looking the temperature it needs to be. They don't sit there and brush

their solder on or their filler material on, you know, minute after minute, you'll watch them.

The heat will get exactly where it needs. They put it in, they're done, they're gone.

And that's something that does take some time. It's not something you're going to pick up

overnight. It can be aggravating like anything else to learn and to get that skill set. But

once you get it, it's, it's always going to happen. How much do you think tool choice actually

has, uh, when it starts to matter in this, you know, particular case? It's huge. You know,

being here at the show, obviously we have both, uh, distributors of ours and end users coming in

and we spend a lot of time talking to them about, you know, obviously our equipment and then they

will be asking us about competitive equipment. Well, what's good, what's bad. And that's the

thing that we do tell them. Yes, there are differences in the market there is. And it's

not only a difference from one competitor or one company, there's different pieces of equipment

within those, those, um, companies that manufacture it. Always use the term. I said,

there's, there's a right tool and there's a wrong tool, but there's always the right

tool for the job that you're working with. And you need to understand that. So sometimes it's,

it's knowing, uh, is there a better tool to use for what I'm doing? Sometimes maybe, maybe not,

but knowing the differences, knowing what is, um, fits the application that you're working with

to better, um, perform, then that's going to do just what we talked about earlier.

How can I more efficiently finish my job? Cause that's, you talk to any contractor,

time is money. I need to be able to get in, get my job done, get it done correctly.

And then make sure that it's, that I don't have to come back. It could be process,

procedure or equipment that gets you there. Yeah. Um, are there any examples that you think

of off the top of your head that, that have come up that you can kind of share?

One of the ones we get a lot of questions about is whether I use an air fuel system or a, um,

oxy fuel system. And that's just a simple matter, whether I'm using oxygen introduced with,

with the fuel, which does, excuse me, does create more heat. Or do I use an air fuel system,

which is actually more portable. So those are the, those are the questions that we usually

ask people. Okay. Is portability the premium that you're working with is higher heat,

the premium that you're working with. So depending on the job that you're doing,

the application that it's in and the condition. So the environment could play into this too.

We could determine, all right, is air fuel the best solution for you? Or is oxy fuel

the best solution for you? Um, and like I said, there could be variables that come into each of

those depending on which direction we go in. Yeah. And look, it, it takes experience, right?

Over time you understand which tools to go with, which things, maybe not what works, what works

and what doesn't work. But, um, I want to go back to the rushed sort of feeling. What is,

what's a brazing best practice that everyone knows, but still skips when it comes and they

feel rushed? Yeah. The one that we see more and more now is people will skip using nitrogen as

a purge. That is an area that, um, the good tradesmen, they will tell you, hands down,

you don't ever skip on that. It does take a little more time. So now I've got to use another

piece of equipment. I've got to take the time to get it set up. But if I'm using that back purge,

what it does is eliminates the oxidation inside your tubing once you, when you're brazing. Now,

does that mean that I can't get a good braze when I'm not doing that? No, but what it will do

almost every time is you will get that oxidation. So what can happen is that oxidation can break off

and it will wind up in your system. So when we talked about, you know, efficiency, we talked

about getting the job done. It's not always just getting the job done today because most,

most contracts are going to tell you, I want a customer for life. So what they don't want to do

is do an installation knowing that, you know, six months down the road, they have to come back

because something happened where the oxidation got into the system that I had to break into,

clean out and then redo. So they'll tell you very quickly. And in fact, I've had a lot of

contractors tell me that I'm looking for a customer for life. So I'm going to do it absolutely right

the first time. So back to what your question was, the fact of not using that nitrogen,

yes, it can save time. It can save money, but it's not always the best thing for the long-term

solution. Right, exactly. And then it would cost it more time and it becomes more expensive.

Much more. At the end of the day. Much more. I mean, think about if you, if you're doing the

same job twice and you're only making the money once, I'm not a mathematician. The math doesn't

really work. I can figure that one out. It doesn't necessarily work out there.

Where does brazing training break down once really someone's actually on a job site?

I always say it goes back to complacency. When you forget the basics, it's again,

those true craftsmen, they never forget the basics. You can watch it day in and day out, but

when you see people that do, they take those steps away. They don't clean their material.

They don't brush their material. They don't do the things that they have been taught and

ingrained to do. And then they get complacent in what they're doing later. All that does is

cause problems. And typically you're going to find that those people that do that, they,

I won't say they don't survive in the industry, but they will have a reputation in the industry.

I'm sure you've seen that time and time again.

Unfortunately, yes. And you know, and it's not just in brazing. You find that

everywhere. Somebody taking shortcuts is not the solution. That's the, that's the one thing that I

will always tell people. And again, I always talk to, I talk about those craftsmen. They will tell

you the same thing. Don't take a shortcut. Do it right the first time. It's something to think

about, especially if you're new in the industry, right? And you want to make sure that you want to

have a good reputation in the industry is making sure that you follow the steps and you do the

right work and you have the right tools sort of behind that. And that's extremely important.

You know, to that point, I, one of the things that I really love is when you see

somebody new to the industry and they have that inquisitive mind that they ask the questions,

you know, maybe who they're working with at that particular moment, they don't tell them every

single step that they're doing. You're not articulating that. They're not saying, okay,

I do this, I do this, I do this, but you're watching it. You're watching them do it. But

what is amazing to me is when you see that young person, they've watched the whole process. And

then they, when they're finished, the guy said, well, do you have any questions? He goes, well,

why did you do this? And I love that because now, and you'll even see the guys that are more

experienced, they'll kind of light up because they love the fact that, oh, you just asked me

one of the basic questions. You just asked me why I did this. And then usually, again, it's,

it's fun to watch them say this, well, all right, that's part of the basics that you're going to

learn that you do every time. And now let me explain to you why you do that. And to me, that

is the thing that is so, I use the term endearing about the industry. I mean, I've been doing this

for 40 years. So, uh, I, I, you know, it's, it's part of my DNA and to see, you know, the next

generation coming in and have that inquisitive nature to ask the questions, why are you doing

that? You know, can I do this? Can I do that? Um, and you know, Hey, we are always looking for ways,

you know, can I do this? Can I take a shortcut and make it do this? And you get the guy that

goes, no, you can't. And, but again, why, why, why can't I do that? And then you get that,

then you get the reason for it and you see the light bulb go off. Oh, okay. That makes sense.

And hopefully that resonates and it stays with them for their entire career.

Yeah. Well, most trades people are problem solvers. They want to, right. They want to,

they want to solve and they want to make sure that they, they do it right. But

you know, showing up to the job site, making sure that they, uh, are open to learn, right. And learn

from some of their mistakes, the things that they've, like you said, maybe they cut a corner

or something. Made a mistake. Does that happen? Yeah. Does that happen? Well, you know, it's

funny. I mean, it's interesting you say that because usually the guys that have been around

a while, that's what they're going to tell you. I know this works because I've done it the wrong way

enough to know don't ever do that again. Sure. And right, wrong, or indifferent. We do learn

from our mistakes or we hope that we do and don't make the same ones twice. And that's the why

piece that comes in from a, from a good trainer. They can tell you, you don't do it this way. And

this is why you don't do it that way. What would you say, what is the difference, uh, between

equipment that looks good in a demo and equipment that survives daily job site, uh, abuse?

You actually said it very well. It's, it's the, it's the durability part of it is, is huge. Um,

you know, when you've got, if you got somebody that's DIY, you know, Hey, I do a little bit of

plumbing on the side. I do work at my house or whatever. Do I need the most robust industrial

product that's out there? Probably not. But if it's a tool that I'm using every day and I'm

depending on that tool, remember what we talked about, time is money. If I've got a tool that

fails in the field, that's costing me time, which is costing the company money. So I need a tool

that we know will work day in, day out, every day, exactly the same way. So that's really where it

comes into. So yes, if I'm working a demo, we're doing demos here. You know, is this a strenuous

environment that is being used in? No. Now, if I'm under a house and I'm dragging it through

the dirt and I'm work, it needs to be able to stand up to that. So to answer your question,

very specifically, it's the durability that makes the difference. And obviously you want to invest

in a particular tool or product or brand to make sure that it lasts for, for a very long time.

Otherwise, like you said, it's, it's going to cost you more in the long run. So if you cut,

cut corners, or you buy something that necessarily is not the right fit, or maybe it's a little bit

cheaper that in the long run, it's going to cost you. Andrew, let me, I tell, I tell people a story

because I've had people ask me, well, how long does something last? And I said, well, it depends

on what you do with it, how well you take care of it. But, um, kind of a long story. I'll make it

as short as I can, but we had somebody come to us several years ago and he sent us a letter and

said, look, I've been in the trade for 40 years. I'm retiring, but I wanted you to know that the

equipment that I'm using was my grandfather's. So this guy has worked 40 years in an industry

that it was equipment that his grandfather had used. That's a testament to durability. So, um,

will every piece of equipment last that long? No, but can it? Yes. And that fits exactly what

you're talking about is, you know, am I buying a product that has the reputation that can do that?

Yeah. Now you take care of it. You take care of your tools. Your tools will take care of you.

You abuse them, guess what? You're going to pay for it again. But if I do the right things,

I take care of it. Will it last? 100%. What are some examples of maintenance over time to,

to keep, uh, these set of tools, um, in good working condition? What, what can some people do?

Depending on which we got. So let's just, let's start at one end, the regulator,

the regulator that you're working with. Typically most damage comes from storage

or transportation. So, I mean, I always say, you know, if I've got a tool truck,

it is packed with stuff, but if I've got it configured in such a way that it's not going

to get damaged when I'm transporting it from job to job, then it's not going to get damaged.

So if you think about a regulator, it's on a cylinder. Um, most people don't necessarily

take it off of the cylinder from job to job, but if I secure it so that the cylinder won't fall

or something else won't hit it, well, it's not going to get damaged. So from a maintenance

perspective, there's really not a lot that I need to do with my regulator. I just need to protect it.

Um, hoses, kind of the same thing. What I need to do is I need to make sure they're,

they're clean. I don't want to get them in a situation where they're up against something

that's sharp or hot. So I protect it from that. So again, from a maintenance perspective,

it's not a lot to do. Torch, um, that one there does, there is a little bit of maintenance that

I could do, but it's only dealing with the consumer, the tip part of that. And that's

just a matter of periodically taking a look at the tip end. Is there, do I have material

at the tip end at the orifice? If it is, I need to clean it. There's a little tip cleaner

that I just need to take out. But again, what we find is that majority of the time

that there's damage or a reason that it's not functioning, it's because somebody damaged it.

I dropped it. I'm not securing it when I'm transporting it. I'm not securing it when I'm

finishing the job. So I always tell people, yes, there's a few maintenance things, but it's very

few. You know, the tip, I keep it clean and I'm good, but just storing and transporting it so that

it does not get damaged and you're good. Yeah. So you want to make sure that it lasts for a long

time. And in the example that you gave, that, uh, uh, that it lasts for that long. Uh, that's,

that's wild. That's wild. But I guess there are stories like that.

There are. And luckily there's not so many of them that they don't,

somebody doesn't come and buy again or else I'm out of a job.

That's a good point. Yes. If someone here at AHR changed one habit tomorrow to save time and

avoid callbacks, what should it be? I'm going to go right back to where I started. Don't cut

corners. You know, it's, it's interesting when, when somebody does cut a corner, they typically

do it knowingly. They did it knowing, uh, you know, I'm, I'm rushing. I'm not going to clean

my material before I've joined it together. So I always tell people don't cut the corners,

do what you've been taught, do what you do best. Like we said, do it the same way every single

time. So, and it will always pay off a hundred percent of the time. John, your wealth of

knowledge and your experience, you can tell that you've seen a thing or two out there.

Um, and it's great to get your feedback about sort of the industry and, you know, brazing

and different parts of, uh, welding and being at the HVAC show. So I appreciate your stopping by

the, uh, the booth and, uh, thank you so much. Well, I just, if your audience didn't catch that

guys, everybody, he just called me old, but Andrew, I really do appreciate it. Thank you

for being here and thank you for supporting the industry. Thank you so much. You got it, buddy.

Thanks for listening to the Lost Art of the Skilled Trades. Visit us at andrewbrown.net

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